unless the child care centre provides for one set/kid, classic will be the way to go. otherwise the set pieces will all get jumbled up and yes, it is going to be a wee bit difficult to sift thru the pieces to arrange them back into their respective sets/boxes. just my dua sen...

wah... it's mindstorm ev3 bro, not mitsubishi evo3. i think the 'cosmobot' reference is with regard to its build according to the cosmo theme (as is the dr heartbeat for the nxt series). and you pretty much build your robot according to what you need it to do. i believe the ev3's are lego's latest mindstorm sets...